The Analysis of Three-Tubed Variations of Hot Air as a Coffee Bean Dryer

Abstract

One of methods to process coffee beans is carried out by drying and during this period, drying by mechanical and/or artificial devices is meant to overcome the deficiencies of drying in the sun. In this study, coffee beans were dried in the oven-style dryer, utilizing hot air from a furnace. The purpose of this study is to investigate how good the number of holes is to dry coffee beans using hot air. The hole variations were about 300, 350, 400 holes. This study shows that the drying time was two hours for drying coffee beans using hot air; the water content of coffee beans reduced to 37.67%, while, initially, the coffee moisture is about ± 60%. Hence, the drying process was noted as efficient with the percentage efficiency was 36.68%. The best numbers of holes for efficient variations were about 400 holes and the moisture of final content in the coffee beans was recorded to 38.59%. Keywords: Analysis, Dryer, Beans, Coffee, Hot air